source/hslider.cpp

   1 #include <msp/gl/matrix.h>
   2 #include <msp/gl/meshbuilder.h>
   3 #include "graphic.h"
   4 #include "hslider.h"
   5 #include "part.h"
   6 #include "style.h"
   7
   8 namespace Msp {
   9 namespace GLtk {
  10
  11 HSlider::HSlider():
  12         total_margin(0)
  13 { }
  14
  15 void HSlider::autosize_special(const Part &part, Geometry &ageom) const
  16 {
  17         if(part.get_name()=="slider")
  18         {
  19                 const Sides &margin = part.get_margin();
  20                 const Geometry &pgeom = part.get_geometry();
  21                 ageom.w = std::max(ageom.w, pgeom.w*3/2+margin.left+margin.right);
  22                 ageom.h = std::max(ageom.h, pgeom.h+margin.top+margin.bottom);
  23         }
  24 }
  25
  26 void HSlider::rebuild_special(const Part &part)
  27 {
  28         if(part.get_name()=="slider")
  29         {
  30                 const Graphic *graphic = part.get_graphic(state);
  31                 if(!graphic || !graphic->get_texture())
  32                         return;
  33
  34                 Alignment align = part.get_alignment();
  35                 if(max>min)
  36                         align.x = (value-min)/(max-min);
  37
  38                 Geometry pgeom = part.get_geometry();
  39                 align.apply(pgeom, geom, part.get_margin());
  40
  41                 GL::MeshBuilder bld(part_cache.create_mesh(part, *graphic->get_texture()));
  42                 bld.matrix() *= GL::Matrix::translation(pgeom.x, pgeom.y, 0);
  43                 graphic->build(pgeom.w, pgeom.h, bld);
  44         }
  45 }
  46
  47 void HSlider::button_press(int x, int, unsigned btn)
  48 {
  49         if(btn==1 && max>min)
  50                 click(x);
  51 }
  52
  53 void HSlider::button_release(int, int, unsigned btn)
  54 {
  55         if(btn==1 && dragging)
  56                 end_drag();
  57 }
  58
  59 void HSlider::pointer_motion(int x, int)
  60 {
  61         if(dragging)
  62                 drag(x);
  63 }
  64
  65 void HSlider::on_geometry_change()
  66 {
  67         drag_area_size = geom.w-total_margin;
  68 }
  69
  70 void HSlider::on_style_change()
  71 {
  72         if(!style)
  73                 return;
  74
  75         if(const Part *slider_part = style->get_part("slider"))
  76         {
  77                 slider_size = slider_part->get_geometry().w;
  78                 const Sides &margin = slider_part->get_margin();
  79                 drag_area_offset = margin.left;
  80                 total_margin = margin.left+margin.right;
  81         }
  82
  83         on_geometry_change();
  84 }
  85
  86 } // namespace GLtk
  87 } // namespace Msp